Main page/Guides/Bestiary/Boss list/Alchemical Hydra

Alchemical Hydra
General info
Released		September, 25 2019
Combat level		428
Respawn timer		20 seconds
Combat info
Hitpoints		1100
Max hit		17+17 (normal) 26+26 (empowered)
Aggressive		Yes
Poisonous		Yes
Weakness		Ranged and Dragonbane weapons
Attack style		Magic and Ranged
Slayer info
Required slayer level		95
Slayer XP		unknown
Assigned by
Immunities
		Yes
		Yes

Alchemical Hydra

The Alchemical Hydra is a five headed hydra with a combat level of 428. The boss has four different phases and will have different type of special attacks in each phase. Level 95 slayer is required to enter and attack the Alchemical Hydra.

The Alchemical Hydra uses both ranged and magic to attack players. It changes its attack style every three attacks, whether if they hit or not. Both these attacks can be fully negated by using Deflect Missiles and Deflect Magic prayers. After every nine normal attacks, the Alchemical Hydra will perform a special attack.

The Alchemical Hydra has a heavy damage reduction in the first three phases. The damage reduction can be removed by having chemical sprayed on the boss - which happens when the boss stands on top of the pools. Read below for more information.

How to get there

You can get to the Alchemical Hydra by using the teleport interface (which can be accessed by pressing CTRL + T on your keyboard or by clicking on the world map in-game).

This will teleport you outside of the Alchemical Hydra's lair.

Once inside, the player can not exit through the door. Only teleporting out or dying will allow the player to leave the lair.

Instance

Alchemical Hydra is an instanced boss. Unlike the instanced boss Vorkath, this boss does not require the player to create a new instance every kill. It has a respawn timer of 20 seconds.

Entrance fee

Entrance fees per rank
Hardcore ironman: 25K Ironman: 250K Regular players: 50M Super donators: 35M Extreme donators: 25M

Strategies

The Alchemical Hydra has four phases: poison, lightning, flame and enraged. The Alchemical Hydra begins with the poison phase. A new phase will commence every 275 damage the boss has taken (or 25% of it's total health), similar to the boss Nex.

At the start of each phase, the Alchemical Hydra will have a 75% damage reduction to all weapons and a 50% damage boost in first two phases. The damage reduction and damage boost can be removed by luring the boss over one of the chemical pools on the floor. If the Hydra is lured over the wrong chemical pool, the attack damage will be increased instead.

The Alchemical Hydra will attack with both Ranged and Magic: the attack style will change after every three normal attacks and after every nine normal attacks the Alchemical Hydra will perform a special attack. The normal attacks can be fully negated if the player is switching the prayers correctly.

Poison phase

This is the first phase of the Alchemical Hydra. The boss will have 5 heads and green skin during this phase. The 5-headed green Hydra has to be lured to the red chemical pool to remove its damage reduction and damage boost.

After the first three normal attacks, the Alchemical Hydra will throw poison blobs around the player's location will deal up to 12 damage per tick when standing on them.

Lightning phase

The Alchemical Hydra will have 4 heads and a blue skin during this phase. The 4-headed Hydra has to be lured to the green chemical pool to remove its damage reduction and damage boost.

During this phase, the Hydra will launch lighting projectiles across the room. When the players get hit by the lighting, they will be temporarily paralyzed and the following message will appear in the chatbox:

When the 4-headed Hydra reaches 550 hitpoints (or 50% of its total health), it will lose one of its heads and the next phase will start.

Flame phase

The 3-headed red skin Alchemical Hydra will need to be lured over the blue chemical pool to remove its damage reduction and damage boost.

During this phase the Hydra will, as its special attack, stun the player and walk to the center of the chamber. Once it has reached the center, the Hydra will breathe layers of fire on both sides of the player and a tracking fire. The tracking fire will follow the player's movement and will do up to 20 damage if the player does not dodge it. The damage can be avoided by walking/running around. The Hydra will start attacking normally again 10 seconds after it launches the tracking fire.

When the 3-headed Hydra reaches 275 hitpoints (or 25% of its total health), it will lose one of its heads and the next phase will start.

Enraged phase

The 2-headed Hydra will have grey skin during this phase and will not have any damage reduction (thus does not need to be lured over any chemical pool).

During the enraged phase, the 2-headed grey Hydra will change attack styles after every attack. The special attack from the poison phase (poison blobs) will also be used during this last phase. It is recommended to continuously switch prayers during this phase.

Gear and inventory

Ranged set-up

Gear	Inventory
Helm: Pernix cowl Body: Pernix body Legs: Pernix chaps Boots: Glaiven boots Weapon: Twisted bow Ammunition: Amethyst arrows Shield: Divine spirit shield Cape: Completionist cape Amulet: Necklace of anguish Gloves: Barrows gloves Ring: Ring of suffering	2x Overload flask (6) 4x Super restore flask (6) 22x Saradomin brew flask (6)

Drop Table

Drop	Name	Quantity	Rarity	Ratio
	Hydra's claw	1	Very Rare	1/750
	Hydra leather	1	Very rare	1/500
	Alchemical hydra heads	1	Very rare	1/250
	Hydra tail	1	Very rare	1/190
	Hydra's heart	1	Very rare	1/185
	Hydra's fang	1	Very rare	1/185
	Hydra's eye	1	Very rare	1/185
	Brimstone key	1	Rare	1/60
	Uncut onyx	1	Rare	45/100
	Dragon knife	20-30	Rare	1/50
	Dragon thrownaxe	20-30	Rare	1/45
	Dragon bolts (unf)	20-30	Rare	1/40
	Tooth half of a key	1	Rare	1/35
	Loop half of a key	1	Rare	1/35
	Raw rocktail	30-70	Rare	1/15
	Uncut dragonstone	50-80	Uncommon	1/10
	Rune bar	50-100	Unommon	1/6
	Torstol seed	10-20	Uncommon	1/5
	Raw shark	50-100	Uncommon	1/4
	Yew logs	50-100	Uncommon	1/3
	Coins	500K-1M	Uncommon	1/3
	Hydra bones	2	Always	1/1